Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d48854c0ac30a6…

MALICIOUS

PDF

80.0 KB Created: 2021-03-25 18:01:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa8c26be362c8eddbe25bcdcf1306325 SHA-1: da4282de34a67301f8b6eaec7a46bf5b32a99401 SHA-256: f0d48854c0ac30a624764d23553381029b8be31d934282018e6cc524c65476b8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/strik?utm_term=what+star+is+coming+out+on+december+21st
    • http://penexej.mywebcommunity.org/26077783090.pdf
    • http://dejepuzalew.mygamesonline.org/apocalypse_culture_2.pdf
    • http://vugekowuzujed.scienceontheweb.net/vevolebugobizux.pdf
    • https://cdn.sqhk.co/jenetuwuda/jjhjihW/10831320887.pdf
    • https://cdn.sqhk.co/ritasuxa/jhhgiaa/toca_life_neighborhood.pdf
    • https://cdn.sqhk.co/delojiwuguj/Q5WFjbR/bilibekotabi.pdf
    • https://cdn.sqhk.co/dijabidasu/NGgNgcT/thomas_crossroads_church_newnan_ga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/041eeafa-42c4-49c5-a837-ad36cac3c2be/lawizekunevawuniv.pdf
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_85c312b92bbd499ab693ec52796c6284.pdf?index=true
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_b8ee64dbf1314803befcb339ae6fc04c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ee4d98a0-f35e-43dc-a599-bdccac96f0ac/bosch_serie_6_washer_dryer_not_drying.pdf
    • https://s3.amazonaws.com/vavale/54488954581.pdf
    • https://uploads.strikinglycdn.com/files/bf0fe428-413b-4d61-84ba-37e1c87ab2de/how_to_write_an_introduction_paragraph_for_3rd_grade.pdf
    • https://uploads.strikinglycdn.com/files/6d337955-f44d-4f57-981f-fbd921d7a165/john_dewey_quotes_we_do_not_learn_from_experience.pdf
    • https://s3.amazonaws.com/gazijewevan/50512099748.pdf
    • http://fufudaloxola.onlinewebshop.net/biophilic_design_in_the_workplace.pdf
    • http://sojufuka.atwebpages.com/62848457113.pdf
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_2f04f94f00c64b38b44b03fface242d2.pdf?index=true
    • https://s3.amazonaws.com/vezumobigodub/basic_knowledge_of_excel_spreadsheets.pdf
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_4d838ddd675f4eb29a48da36361cfa58.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93f.bin
9b8fdb80ea2e4547584cdc4cabf25ae127169651d6e6c6ea3f3449d28a67154f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 5656 bytes
font_01_sfnt_off00010c5d.bin
3523b6810ef7d64ecc4c09d9fc264a248081ac67d16b34eaae3a204b7380922f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 11408 bytes

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